JPH086487B2 - Combined type vibration control / wind control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is directed to a vibration disturbance to a structure such as an earthquake or wind.
The present invention relates to a vibration control / wind control device for suppressing the shaking of a structure.

[Conventional technology]

There are active and passive types of conventional structure vibration control and wind control devices.

As an active type vibration control / wind control device, for example, Japanese Patent Laid-Open No. 62-
There is a device described in Japanese Patent No. 268478 and Japanese Patent Laid-Open No. 63-156171, and a weight and a vibration exciter are provided at the top of a structure, and vibration is generated based on the vibration external force such as an earthquake or wind and the response of the structure. It is known that a control force is applied to a weight from a machine and the reaction force suppresses the vibration of a structure.

On the other hand, as a passive type vibration control / wind control device, for example, there is a dynamic vibration absorber described in Japanese Patent Laid-Open No. 63-114773, and a weight having a mass of about 1/100 of the weight of a structure has a predetermined spring constant. There is a structure in which the vibration of a structure is damped by connecting it to a structure with a spring having a and absorbing the vibration of the structure by the vibration of a weight having a natural period substantially equal to the natural period of the structure. Further, Japanese Patent Application Laid-Open No. 63-254247 discloses a pendulum type dynamic vibration reducer using a suspending material instead of a spring as a connecting means for giving a specific natural period to the dynamic vibration reducer. There is.

[Problems to be Solved by the Invention]

Active type vibration control and wind control devices can be expected to have a vibration control and wind control effect that exceeds the limits of passive control and wind control devices, but they require external energy to operate the vibration exciter, while passive control The mold does not require external energy.

Therefore, the use of active vibration control and wind control devices
Although it is desirable from the standpoint of obtaining a wind control effect, it uses external energy, so if the supply of external energy is interrupted in an emergency, there is the problem that no seismic control or wind control effect can be obtained.

In order to solve this point, the present invention provides a composite type vibration control / wind control device that combines an active type and a passive type.

[Means for solving the problem]

In order to prevent the effect of the present invention from being lost due to the supply energy being cut off, the present invention is intended to prevent the loss of the effect of the active type vibration control / wind control device, which is desirable for its use in view of the vibration control / wind control effect. Combined with the device, it is a combined type vibration control and wind control device.

First of all, this is because the active damping system
In the unlikely event that energy cannot be supplied, the passive type vibration control / wind control device operates to provide the control / wind control effect.

A weight that can move relative to the structure is applied to the structure, and the weight is excited according to the vibration of the structure and / or the input vibration disturbance, and a control force for suppressing the vibration of the structure is applied. In order to vibrate the weight in at least two kinds of cycles including a cycle in which the weight is oscillatedly connected to the structure so that the weight can vibrate When the vibration exciter does not operate, the weight and the connecting means synchronized with the natural period of the structure by the switching means act as a passive vibration control / wind control device. The vibration absorber is constructed.

A spring or the like is used as the connecting means, and the weight is provided with a period synchronized with the period for active type vibration control / wind control and the natural period of the structure for passive type vibration control / wind control To That is, when passive type vibration control / wind control is performed, it functions as a dynamic absorber by vibrating in a cycle that is approximately equal to the natural period of the structure that controls / controls the wind. It is preferable to avoid the resonance of the weight and the structure during wind, and to set a long cycle.

For that purpose, as the switching means, a fixing device or the like which is interposed in the middle of the connecting means and in which the restraint state with respect to the connecting means is variable can be used. For example, a structure in which the continuous state of two separate springs is fixed and released by the fixing device. And so on. Further, when applied to a pendulum type vibration control / wind control device, a method in which a hanging material such as a wire rope or a chain is provided in multiple stages and the middle is fixed and released can be considered.

[Work]

When it becomes impossible to operate the active vibration control / ventilation device, the passive vibration control / ventilation device starts operating and the vibration control / ventilation function can be maintained.

〔Example〕

Hereinafter, an example of the combined vibration control / ventilation device of the present invention will be described with reference to the accompanying drawings.

Fig. 1 shows an example of the basic structure of the combined vibration control and wind control device. The weight 1 (mass) is supported by rollers,
Can move left and right without restraint. A vibrator 2 and a spring 4 are attached to this, and the spring 4 is further connected to the second spring 5 via the fixing device 3, and the second spring 5 is connected to the support 6.

When used as an active vibration control / wind control device, by releasing the fixing device 3, the spring 4 and the second spring 5 are released.
Functions as a continuous long spring. In this state, if the vibration exciter 2 is operated, the function as an active vibration control / wind control device can be obtained. It should be noted that the adjustment of the natural period of the device, which is determined by the mass of the weight and the spring, is first adjusted in the case of the combination of the weight 1 and the spring 4, which is used as a passive type, and the value is adjusted to the period of the structure, In the case of the combination of the weight 1 and the spring 4 + the second spring 5 used as, the length is longer than the cycle of the structure.

When the active vibration control / wind control device cannot be operated, the fixing device 3 is fixed. As a result, the structure resonates with the weight 1 and the spring 4, and the function as a passive vibration control / wind control device is exerted.

In addition, if the fixing device 3 is locked in a natural state and is released by external energy so that the fixing device 3 is always released, when the external energy supply is cut off, the fixing device 3 is immediately fixed.

FIG. 2 shows a simplest structure in which the weight 1 slides along the rails 7 by the wheels 6 provided on the weight 1 as a mechanism for moving the weight in the combined vibration control / ventilation device having the above-described configuration. It is shown. As the weight 1, an iron material, an uninterruptible storage battery, an elevated water tank, or the like can be used.

FIG. 3 shows an example of the vibration exciter 2. A hydraulic or electric actuator or the like can be used, and it is controlled by a computer in accordance with the input external vibration force or the response of the structure. Basically, the weight is
It suffices to provide a control force that oscillates with a 90 ° phase shift. By applying the control force to the weight 1, a reaction force is generated with respect to the structure, and the vibration of the structure can be reduced. In the example of FIG. 4, the vibrator 2 is a weight 1 having a recess.
It is stored inside the to save space.

FIG. 5 shows, as an example of the fixing device 3, a stop ring that engages with a groove 10 of a rod 8 and a load receiver 9 provided on the rod 8.
11 shows a device in which 11 are combined.

Normally, the stop ring 11 is engaged with the groove 10 of the rod load receiver 9 by the spring 12 at the front end to function as a key, and the rod 8 is fixed.

If you feel an earthquake or the vibration from the wind increases,
The hydraulic jack 13 shown in the figure operates to push the stop ring 11 wide. Therefore, the rod 8 is released and can move freely.

When an abnormal state occurs and the vibration exciter 2 does not operate, the supply of hydraulic pressure to the hydraulic jack 13 is also stopped, and the force of pushing the stop ring 11 out due to the decrease in hydraulic pressure disappears,
The stop ring 11 is pushed by 12 and engages with the groove 10 of the rod load receiver 9 to serve as a key, so that the rod 8 is fixed.

7 to 9 show another example of the fixing device 3, in which an appropriate number of plate members 15 are provided on the rod 14 and the plate members 15 are fixed or released by the brakes 16. The brake 16 is always fixed with a spring material or the like, and the brake 16 is released by an external driving force such as electricity or hydraulic pressure at the time of an earthquake to allow the rod 14 to move freely.

Fig. 10 shows another application example of multi-stage pendulum type combined seismic control.
It is an example of a wind control device. The weight 21 is suspended from a support frame 26 by a suspending member 24 and a second suspending member 25 to form a pendulum. A fixing device 23 is installed between the hanging members 24 and 25.

When the vibration exciter 22 operates as an active vibration control / wind control device, the weight of the weight 21 is released by releasing the fixing device 23.
Becomes a long pendulum. At the same time that the energy supplied to the shaker 22 is cut off, the lock release energy of the fixing device 23 is also lost, the fixing device 23 becomes fixed, and the weight 21 becomes a short pendulum. If the period of the short pendulum is adjusted to the natural period of the structure, it will operate as a passive vibration control device.

In addition, since the vibration exciter 22 provides damping to the device when it is operating as a passive vibration control / wind control device, this value is
Set the optimum damping value for the wind control effect.

11 and 12 show a specific example of a method for suspending a weight, in which a pulley 27 is used to suspend a suspending member 24 such as a wire rope. Although this example is a one-stage example, a similar structure can be used in the case of two stages such as the vibration control / ventilation device of the present invention. As the weight 21, as in the case of the above-described embodiment, an iron material, an uninterruptible storage battery, an elevated water tank, or the like can be used.

FIG. 13 schematically shows an example of a hydraulic type vibration exciter.

In this example, the actuator as the shaker 22
A shutoff valve 28 as shown in FIG. 14 is provided. Shut-off valve 28
The spring is normally opened by the spring 29, and is closed by hydraulic pressure against the biasing force of the spring 29 when operating as an active vibration control / wind control device. When the hydraulic pressure disappears due to an abnormality of the vibration control / ventilation device, the shielding valve 28 is opened, and the hydraulic oil on the right side (left side) of the actuator flows through the shielding valve 28 to the left side (right side). Since the flow resistance is generated depending on the opening degree of the shutoff valve 28 at that time, when functioning as a passive vibration control / wind control device, the actuator as the vibration exciter 22 acts as a damper for the weight 21 of the pendulum.

FIG. 15 shows an example of an electric vibrator, which has a structure in which the rotation of the electric motor 30 is converted into a linear movement of a rod 32 by a screw 31. Since the rotation of the electric motor 30 is too fast as it is and the load is large, the rotation speed is adjusted and the rotational force is increased by the gear 33.

The shaker 22 and the weight 21 may be simply connected as shown in FIG. 16, but the weight 21 is provided with a recess 34 as shown in FIGS. You can save space if you put it inside.

Regarding the fixing device 23, for example, FIG. 6 and FIG.
It is possible to use the same device as the fixing device 3 of FIGS.

〔The invention's effect〕

According to the composite type vibration control / ventilation device of the present invention, even if the operation of the active type vibration control / ventilation device is stopped for some reason, it still functions as the passive type vibration control / ventilation device. Therefore, the vibration suppression effect of the structure is maintained, thereby reducing the fear of occupants' shaking, preventing the functional damage of the equipment inside the structure due to the shaking, and also reducing the damage of the structure can do.

Further, mechanically, the above effect can be easily achieved with a simple structure in which a fixing device or the like as a switching device is interposed in a connecting device such as a spring that connects the weight and the vibration device.

[Brief description of drawings]

FIG. 1 is a principle view showing an example of the combined vibration control / wind control device of the present invention, FIG. 2 is a side view showing a specific example of the weight sliding mechanism in the embodiment of FIG. 1, FIG. 3 and FIG. FIG. 4 is a side view showing an example of an exciter, FIG. 5 is a sectional view showing an example of a fixing device, FIG. 6 is a front view of a stop ring used for the fixing device, and FIG. FIG. 8 is a vertical sectional view showing an example of FIG. 8, FIG. 8 is a sectional view taken along the line II of FIG. 7, and FIG. 9 is a perspective view of a rod and a plate member portion in the fixing device of FIG. FIG. 10 is a principle view showing an example in which the combined type vibration control / ventilation device of the present invention is applied to a pendulum type vibration control / ventilation device, and FIGS. 11 and 12 are specific examples of the method of suspending a weight. FIG. 13 is a side view and a front view showing an example, FIG. 13 is a sectional view showing an outline of the structure of a hydraulic vibrator, FIG. 14 is a sectional view showing a structure of a shutoff valve of the vibrator of FIG. FIG. 15 is a perspective view showing an example of an electric vibration exciter, FIG. 16 is a side view showing an example of a method for joining the shaker and the weight, and FIGS. 17 and 18 are joining the shaker and the weight. It is a side view and a front view showing other examples of a method. 1 ... weight, 2 ... vibrator, 3 ... fixing device, 4 ... spring, 5 ... second spring, 6 ... wheel, 7 ... rail, 8
…… Rod, 9 …… Load receiver, 10 …… Groove, 11 …… Stop ring, 12 …… Spring, 13 …… Hydraulic jack, 14 …… Rod, 15 …… Plate, 16 …… Brake, 17 …… Bearings, 21 ... weights, 22 ... vibrators, 23 ... fixing devices, 24 ... hanging materials, 25 ... second hanging materials, 26 ... support frames, 27 ...
… Pulley, 28 …… shut-off valve, 29 …… spring, 30 …… electric motor, 31
…… Screw, 32 …… Rod, 33 …… Gear, 34 …… Guide,

Claims (2)

[Claims] 1. A weight movable relative to a structure and a vibration applied to the weight according to the vibration of the structure and / or an input vibration disturbance to provide a control force for suppressing the vibration of the structure. The vibration exciter and the connecting means for connecting the weight to the structure so that the weight can vibrate. The connecting means vibrates the weight in at least two types of cycles including a cycle in synchronization with the natural cycle of the structure. When the vibration exciter does not operate, the weight and the connecting means synchronized with the natural period of the structure by the switching means are provided as a passive vibration control / wind control device. A composite type vibration control and wind control device that is configured as a dynamic vibration absorber. 2. The combined vibration-damping / wind-control device according to claim 1, wherein the switching means is a fixing device that is interposed in the middle of the connecting means and has a variable restraint state with respect to the connecting means.